13. 'The Exorcist II: The Heretic'

The original Exorcist remains one of the greatest horror movies ever made, so it's no big surprise the sequel wasn't any good. What is surprising is just how horrible it is. Max von Sydow, Linda Blair, Kitty Winn and many others reprised their roles from the original, but director William Friedkin wisely stayed far away. Much of the movie involves recovering the memories of now 16-year-old Regan MacNeil, but it's a snooze-fest without any scares.